1211324447 has 2 divisors, whose sum is σ = 1211324448. Its totient is φ = 1211324446.

The previous prime is 1211324431. The next prime is 1211324449. The reversal of 1211324447 is 7444231121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211324447 - 2⁴ = 1211324431 is a prime.

Together with 1211324449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211324449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605662223 + 605662224.

It is an arithmetic number, because the mean of its divisors is an integer number (605662224).

Almost surely, 2^1211324447 is an apocalyptic number.

1211324447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211324447 is an equidigital number, since it uses as much as digits as its factorization.

1211324447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 29.

The square root of 1211324447 is about 34804.0866422321. The cubic root of 1211324447 is about 1065.9908921543.

Adding to 1211324447 its reverse (7444231121), we get a palindrome (8655555568).

The spelling of 1211324447 in words is "one billion, two hundred eleven million, three hundred twenty-four thousand, four hundred forty-seven".